These are adapter plates that can be used to convert a Gemmy plastic base with folding legs for fan models YEF-125 & YEF-200 to work with the smaller fan models SJD-B2-N, TH-BL3-N, YEF-60, YEF-80. If your base plate is 4 5/8” length between each Motor mounting screws and 5 1/8” between each bottom plate screw then you have the larger mount for YEF-125 & YEF-200 fans. 

The exterior size and legs of Gemmy base plates is the same for all fan sizes, but the interior ring and connectors for the fan and protective base plate are different. I was able to find the stand for larger fans online but not the smaller one. So I designed this adapter piece to fit inside the larger ring. 

Print the adapter in PETG or some form of Polycarbonate or Carbon Fiber infused filament for the best temperature range. I would strongly suggest not using PLA. Two versions of the adapter are included. One is flat, the other has a bit more height. The one with more height provides more plastic and should be able to survive more strenuous movement if your inflatable blows over. In most cases the flat one should work just fine.

There are four holes around the exterior that need screws or small bolts to attach the adapter to the larger base. I used #8 x 1/2" self-drilling Phillips head screws. These let you drill into the base with the screw itself. But you can use any #8 screw around the same length if you drill holes into the base first.